Moirae (military)
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Moirae (Greek: Μοίρα) was in the Byzantine Army the analogue of a Division in the modern armies.
The Commander of a Moira was given the title of Drungarios.
One Moira (=Division) was divided into ten Tagmata (=Battalions).
From Moira the later Greek word Moirarhia or Merarhia (meaning also Division) is derived.